In the diagram,a prism of angle 30^o is used. | vedclass

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(A) Given: Prism angle $A = 30^o$. From the diagram,the angle of incidence at the first face is $i = 30^o$. The emergent ray $RS$ is perpendicular to

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(A) Given: Prism angle $A = 30^o$. From the diagram,the angle of incidence at the first face is $i = 30^o$. The emergent ray $RS$ is perpendicular to the second face,which means the angle of emergence $e = 0^o$. Consequently,the angle of refraction at the second face is $r_2 = 0^o$. Using the relation $A = r_1 + r_2$,we get $30^o = r_1 + 0^o$,so $r_1 = 30^o$. The angle of deviation $\delta$ is given by the formula $\delta = i + e - A$. Substituting the values: $\delta = 30^o + 0^o - 30^o = 0^o$.

In the diagram,a prism of angle $30^o$ is used. $A$ ray $PQ$ is incident as shown. An emergent ray $RS$ emerges perpendicular to the second face. The angle of deviation is.....$^o$

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